JPH0456709B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention provides a method for fixing a refractory closure plate within the frame of a sliding valve closure device in a metallurgical vessel, in which a fastening means operable from outside the frame is attached to the closure plate. The present invention relates to a fixing device for a fireproof closing plate of a sliding valve closing device.

PRIOR ART Various sliding valve closing devices, possibly with a fixed lower plate (three-plate sliding valve), such as linear, rotating or sliding closing devices, of this type always have the same function. In the metal frame, the individual fireproof plates are joined, for example, with mortar, but this requires time-consuming assembly and adjustment work. Equally troubling is the fact that worn boards can break off from the frame.

On the other hand, the following frame is known, for example from DE 26 20 423 A1. This means that in this frame it is possible to easily replace the refractory plate, which plate is inserted into the frame bare, i.e. without a metal plate shell, and can be replaced by adjustable frame parts configured as clamping claws or Fixed without mortar between the frame parts,
It can be tightened in a broad sense, thereby ensuring an immovable position. In this case, the fixing force does not act uniformly but mainly on the circumferential surface of the plate, so
Stress is generated in the plate material in cooperation with the thermal stress generated during operation, and this stress acts to deform it.
In particular, they can cause cracks or accelerate the propagation of stress cracks that have already formed due to uneven circumferential support of the plate, which necessitates relatively early replacement of the plate.

A similar drawback exists in the Federal Republic of Germany's Utility Model No.
This also occurs in the fireproof sliding valve plate according to document 8013402, which is clamped between two parts removably connected to each other by screws of an assembly frame and preassembled by this assembly frame. It is accommodated as a structural unit in the frame of the sliding valve closing device and is fixed there by a dowel pin.

The provision of a metal plate jacket on the fireproof plate before its insertion into the frame of the sliding valve closing device during pre-assembly is considered to prevent cracks (Austrian Patent No. 371,394). However, such a configuration is expensive to manufacture and extremely uneconomical. This is because the worn plate will be lost together with the metal plate outer skin.

Japanese Patent Application Laid-Open No. 59-7474 discloses a device for fixing a closing plate of a sliding valve closing device for a spout in a container containing molten metal, and a narrow surrounding band for fixing the closing plate to a frame is known. It has a fastening means that surrounds only the outer periphery of the closing plate and can be fixed to the frame (FIGS. 3 and 4). This tightening means has two tightening blocks, which are respectively attached to the ends of the shroud, which fit snugly into corresponding recesses in the frame only when they are tightened together. To make this fit possible, the notch in the holding frame is reworked. In this case, the unit consisting of the closure plate and the enclosure including the clamping means must be prefabricated in a factory. Even if the clamping blocks are connected to each other by left-handed and right-handed bolts with hexagonal sections (Fig. 4b),
It is not possible to retighten the envelope within the frame. This is because, upon retightening, the snap-holding of the clamping block in the recess of the frame becomes loose, and it is no longer possible to secure the unit consisting of the closing plate and the surrounding band to the frame.

Problems to be Solved by the Invention Therefore, an object of the present invention is to provide a closure plate that can be installed more easily than before, is securely captured around the entire circumference during use, and is tightened with uniform surface pressure.
The purpose is to make it easily replaceable.

Means for Solving the Problem In order to solve this problem, according to the present invention, the tightening means has an enclosing band fixedly provided on the frame,
At least one operating screw shaft supported within the frame and having an operating head outside the frame and operable from outside the frame.
With the aid of two turnbuckles, a shroud can be tightened around the closure plate.

Effects of the Invention Since the surrounding band is fixedly provided on the frame, it not only has the function of tightening around the closure plate, but also has the function of holding the closure plate on the frame. The closure plate can therefore be placed in the frame without an enveloping band, ie exposed, making the production of the closure plate simple and easy. When replacing the closure plate, the enclosing band remains in the frame, so it can be used repeatedly, and only the exposed closure plate needs to be replaced. Moreover, the screw shaft that operates the turnbuckle is located outside the frame and can be used repeatedly. Since it can be operated from the outside of the frame, the closing plate can be replaced easily and economically.

Embodiments The patent claims 2 to 10 indicate advantageous developments of the invention.

Example The invention will be explained below with reference to the drawings.

The frame 1 of FIG. 1, which is used as a fixed box frame for a closure plate 8, shown as a bottom plate, has a recess 2 extending in the longitudinal direction of the frame 1, a support claw 3 at one end thereof, and a support for this support. It has a tightening claw 4 opposite to the claw 3, and the tightening claw 4 can be operated by an adjustment pin 5 having a right-hand thread and a left-hand thread. A surrounding band 6 (hereinafter simply referred to as band) is provided around the periphery of the recess 2,
It has a turnbuckle 7 guided on the longitudinal side of the recess, into which a fireproof closing plate 8 (hereinafter referred to as fireproof plate or simply plate) is inserted, which acts as a fixed bottom plate in the sliding valve closing device, and the frame 1 This band 6 is tightened around the fireproof plate by a turnbuckle 7 which is operated from the outside of the frame 1 by means of an operating screw shaft 13 (Fig. 2) which is supported within the frame and has a handle 9 as an operating head outside the frame. It will be done. The final fixing of the refractory plate 8 between the support pawl 3 and the clamping pawl 4 is then carried out by turning the adjustment pin 5.

A refractory plate 8 that needs to be replaced as a wear item can be easily replaced and a new plate can be inserted with a few manipulations, this new plate being held by the band 6 against the internal stresses occurring during operation and by the closure device. It is clear that a position can be brought about in which movement is prevented between the support pawl 3 and the clamping pawl 4 against the frictional forces occurring during the opening and closing processes of the holder.
In this case, the band 6 exerts a uniform surface pressure on the circumferential surface of the plate 8, and this plate is, moreover, not subjected to uneven and concentrated bearing forces.

The frame 1 that can be seen in FIG. 2 carries the bottom plate as a refractory plate 8, in which details of the construction and arrangement of the bands 6 and turnbuckles 7 can be seen.
According to this, the band 6 is divided into two band parts on both longitudinal sides, one band part is attached to the support claw 3 by the studs 10, and the other band part is attached to the support claw 3 by the studs 10.
It is attached to the tightening pawl 4 by. The mutually spaced ends of these strip sections are opposite wedges 1 to the clamping wedges 12 of the turnbuckles 7.
1, these clamping wedges can be tightened and untightened by means of an actuating screw shaft 13, with the clamping wedges 12 touching the guide surface 2a of the recess 2 of the frame 1. An adjusting screw 14 is used to adjust the clamping pawl 4.

As FIGS. 3 and 4 show, the actuating screw shaft 13 has a clamping wedge 12 which cooperates with opposing wedges 11 at each of the two opposite ends of the band 6.
is held on a stepped shank 13a with a threaded end 13b, on which one clamping wedge 12, configured as a threaded sleeve, is threaded and configured as a sliding sleeve. The other clamping wedge 12 is provided on the shaft portion 13a so as to contact the stepped edge 13c. By suitably turning the actuating screw shaft 13, which preferably has a handle 9 according to FIG. Wedge 1
Tighten the band 6 through 1. all wedges 1
1 and 12 have intermediate slits 11a and 12a in which the operating screw shaft 13 engages. The wedge angle at which the clamping wedge 12 and the counter wedge 11 cooperate is a function of the maneuverability of the turnbuckle 7 and the tightness component of the band 6 and must be chosen appropriately.

In the turnbuckle configuration according to FIG. 5 as a modification of FIGS. 3 and 4, the operating screw shaft 1
3 holds a screw head 13d at the operating end,
On this screw head, a handle 9 with a corresponding internal thread is rotatable, the inner end face of this handle touches the flange of a bush 15 provided on the operating screw shaft 13, which bush is connected to one of the clamping wedges. 12 serves as a counter-support piece. The other tightening wedge 12 is stopped by a split pin 16 or the like to prevent relative rotation, and the operating screw shaft 13
The operating screw shaft is moved in the axial direction by suitably turning the handle 9, so that a clamping wedge 12 is attached to the opposite wedge fixed to the straight end of the band 6. 11 is pressed or loosened.

According to FIGS. 6 and 7, the frame 21, which is used for accommodating the sliding valve plate 25 as a plate and has a recess 22, has a base 23 for connecting an adjustment mechanism, not shown. This allows adjustment of the sliding valve plate frame in the sliding valve closing device. The portion 21a of the frame 21 is constructed so that it can be moved closer or further away using a mating screw 24. A part of the band 6 is attached to the section 21a, and another part is attached to the frame 21 itself, which frame is equipped with turnbuckles 7 of the type described above for wrapping the band around the straight fireproof sliding valve plate 25. and an operating screw shaft 13.

FIG. 8 shows such an arrangement as is possible in a rotary slide valve. A band 6 with only one turnbuckle 7 is attached to the round rotating plate frame 31.
This is because the round peripheral surface of the fireproof plate 33 is suitable for bringing the band 6 into close contact with uniform surface pressure. The immovable fixation of the plate 33 in the frame 31 takes place via a clamping wedge 12 at a guide surface 32a provided in the frame recess 32.

Preferably, the strip 6 is a flexible steel strip. However, chain belts or wire-knit belts can also be used in some cases. Furthermore, the strip 6 can also be used for frames in which the refractory plate has a circumferential shape different from the illustrated linear and circular shape, for example oval or polygonal.

[Brief explanation of drawings]

1 is a perspective view of the sliding surface of the bottom plate of an embodiment of the band on the fireproof bottom plate fastened to the frame; FIG. 2 is a plan view of the sliding surface of the fastened bottom plate of another embodiment of the bottom plate frame; FIG. 3 is an enlarged sectional view of the turnbuckle of the strip according to FIG. 2; FIG. 4 is a side view along line A--A in FIG. 3; and FIG. FIG. 6 is a plan view of the sliding surface of the embodiment of the sliding valve plate incorporated in the sliding valve frame, FIG. 7 is a sectional view taken along line B-B in FIG. 6, and FIG. FIG. 8 is a plan view of an embodiment of a band on a rotary slide valve housing to which a rotary plate is clamped. 1, 21, 31...Frame, 6...Siege band (band),
7... Turnbuckle, 8, 25, 33... Fireproof closing plate (board), 9... Operation head (handle), 13
...Operating screw shaft.

Claims (1)

[Claims] 1. Frames 1, 2 of a sliding valve closing device in a metallurgical container
In order to fix the fireproof closing plate 8, 25, 33 in the frame 1, 31, a tightening means operable from the outside of the frame acts on the closing plate 8, 25, 33. At least one screw shaft 13 is operable from the outside of the frame 1, 21, 31 by an operating screw shaft 13 which is supported within the frame 1, 21, 31 and has an operating head 9 outside the frame. A fixing device for a fireproof closing plate of a sliding valve closing device, characterized in that the surrounding band 6 can be tightened around the closing plate 8, 25, 33 by means of two turnbuckles 7. 2. The turnbuckle 7 has wedge-shaped tightening irregular cross-section pieces 12, and when the operating screw shaft 13 is operated, these irregular cross-section pieces 12 are wedge-shaped opposed irregular cross-section pieces 11 provided at mutually distant ends of the surrounding band 6.
2. The device according to claim 1, further comprising a frictional connection acting on the circumferential surface of the closing plate 8, 25, 33. 3. Opposing odd-shaped cross-sectional pieces 11 provided at the ends of the enclosing band 6 are opposing wedges that face each other in a roof-like manner, and work together with tightening wedges as tightening odd-shaped cross-sectional pieces 12 provided on the operating screw shaft 13 in opposite directions. Device according to claim 2, characterized in that it acts. 4. The device according to claim 2 or 3, characterized in that the tightening irregular cross-section piece 12 is in contact with the guide surfaces 2a, 22a, 32a of the frames 1, 21, 31. 5 Frame portion 21 in which the surrounding band 6 or a portion of the surrounding band 6 is configured for fixing the closure plates 8, 25
Device according to one of claims 1 to 4, characterized in that it is attached to a, a clamping pawl 4 and a support pawl 3. 6 The operating screw shaft 13 has a screw end 13b and a clamping wedge 12 as a screw sleeve located above it.
and has a smooth shank 13a and a further clamping wedge 12 as a sliding sleeve located thereon,
The outer end surface of this tightening wedge is in contact with the stepped edge 13c of the operating screw shaft 13,
Device according to one of claims 3 to 5. 7 The operating head 9 of the operating screw shaft 13 has a female thread as a handle and is rotatable on the male thread of the screw head 13d, and the open end surface of this handle is supported on the operating screw shaft 13. This bush is in contact with the flange of the operating screw shaft 13.
Claim 1, characterized in that it serves as a counter-support piece for one clamping wedge 12 which can be slid thereon, and the other clamping wedge 12 is arranged on the actuating screw shaft 13 in such a way that it cannot rotate relative to it. Apparatus according to one of clauses 3 to 5. 8. Device according to one of the claims 1 to 7, characterized in that the enveloping band 6 or parts of the enveloping band 6 are configured elastically so as to be self-stretching. 9. If the closing plates 8, 25 are straight and rounded at the ends, the surrounding band 6 is provided with turnbuckles 7 on both longitudinal sides of the closing plates, claim 1. Items 1 to 8
The device described in. 10. One of claims 1 to 8, characterized in that, when the closing plate is polygonal, the surrounding band 6 has turnbuckles 7 between the corners.
The device described in.